Safety structure of curtain

ABSTRACT

A safety structure of a curtain includes a main body having a beam and a curtain body with an end coupled to the beam, and the curtain body includes connecting portions; first latches at another end of the curtain body; second latches separately on each connecting portion; an ascending/descending unit coupled to the main body and including a position limit element in the beam, and a link string with an end coupled to the first latch, passed through the second latch and connected to the position limit element; and third latches installed at another end of the link string, and each third latch includes a pull string, such that if a too-large force is applied to the link or pull string, the connecting portions, first, second and third latches will be separated to prevent the pull string from being wound around a human body and achieve a higher safety effect.

FIELD OF THE INVENTION

The present invention relates to a safety structure of a curtain, inparticular to a safety structure of a curtain capable of preventing apull string from being wound around a human body by accident to achievea higher safety effect.

BACKGROUND OF THE INVENTION

In general, a conventional curtain such as a Roman curtain includes abeam, an ascending/descending unit, and a drapery connected to thebottom of the beam, and the ascending/descending unit includes aplurality of pull strings and an ascending/descending string, and thedrapery is formed by connecting a plurality of transversal droopedsections, and at least one row of through holes are formed on thetransversal drooped sections for passing the ascending/descending stringand fixing the ascending/descending string to the lowest through hole,such that the pull string can be pulled to drive theascending/descending string to link with the drapery to achieveascending or descending motions.

Since the pull string is normally exposed from a side of a window, thepull string may be wound around a child's neck by accident caused by thechild's curiosity or when the child is playing with the pull string. Thepull string poses a serious threat to children's safety.

Therefore, it is a main subject for the present invention to disclose asafety structure of a curtain to achieve a higher safety effect.

SUMMARY OF THE INVENTION

In view of the shortcomings of the conventional curtain, the inventor ofthe present invention based on years of experience in the relatedindustry to conduct extensive researches and experiments, and finallydeveloped a safety structure of a curtain, in hope of preventing a pullstring from being wound around a human body by accident to achieve ahigher safety effect.

Therefore, it is a primary objective of the present invention to providethe curtain with a safety structure to overcome the shortcomings of theprior art.

To achieve the foregoing objective, the present invention discloses acurtain with a safety structure, comprising: a main body, including abeam, a curtain body with an end coupled to the beam, and a plurality ofconnecting portions disposed on the curtain body; a plurality of firstlatches, separately installed at another end of the curtain body; aplurality of second latches, separately installed on each connectingportion; an ascending/descending unit, coupled to the main body, andhaving a position limit element installed in the beam, and a link stringcoupled to an end of the first latch, passed through the second latch,and coupled to the position limit element; and a plurality of thirdlatches, installed at another end of the link string, and each thirdlatch including a pull string installed thereon.

If the link string or the pull string of the curtain is pulled by arelatively large external force, the connecting portions, first latches,second latches and third latches will be separated to prevent the pullstring from being wound around a human body accidentally, so as toachieve a higher safety effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is an enlarged view of Portion a of FIG. 2;

FIG. 4 is an enlarged view of Portion b of FIG. 2; and

FIG. 5 is an enlarged view of Portion c of FIG. 2.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The objects, characteristics and effects of the present invention willbecome apparent with the detailed descriptions of the preferredembodiment and the illustrations of related drawings as follows.

With reference to FIGS. 1 to 5 for a perspective view, an exploded viewand partial enlarged views of Portions a, b and c of FIG. 2 inaccordance with the present invention respectively, a safety structureof a curtain comprises a curtain body 1, a plurality of first latches 2,a plurality of second latches 3, an ascending/descending unit 4, and aplurality of third latches 5.

The main body 1 includes a beam 11, a curtain body 12 with an endcoupled to the beam 11, a plurality of connecting portions 13 coupled tothe curtain body 12 by a sewing thread 131, and a weight portion 14installed inside another end of the curtain body 12.

Each first latch 2 is separately installed at another end of curtainbody 12 and includes an embedding portion 21 disposed at another end ofthe curtain body 12, and a latch portion 22 movably latched with theembedding portion 21, and each latch portion 22 includes a fixing hole221 formed thereon.

Each second latch 3 is installed onto each respective connecting portion13, and includes a fixing base 31 disposed on the connecting portion 13,and a clamp portion 32 movably latched with the fixing base 31, and eachclamp portion 32 includes a through hole 321 formed thereon.

The ascending/descending unit 4 is coupled to the main body 1 andincludes a position limit element 41 installed in the beam 11, and alink string 42 having an end coupled to the first latch 2, passedthrough the second latch 3 and connected to the position limit element41, and an end of the link string 42 is coupled to the fixing hole 221of each latch portion 22 and passed into the through hole 321 of eachclamp portion 32.

Each third latch 5 is installed at another end of the link string 42,and includes a pull string 51, and a pair of connectors 52, 53respectively installed to the link string 42 and the pull string 51 andmovably engaged with each other.

When the present invention is used, the beam 11 of the main body 1 iscombined with the top of the window frame (not shown in the figure), anda force is applied to the pull string 51, such that the pull string 51links with the link string 42 through each third latch 5, and the linkstring 42 is moved upwardly in the through hole 321 of the clamp portion32 of each second latch 3, while each second latch 3 at another end ofthe curtain body 12 is being pulled, so that the curtain body 12 isascended to perform a rolling movement. After the curtain body 12 isrolled to a predetermined position, the position limit element 41 isengaged with the link string 42 to fix the curtain body 12 at thepredetermined position. If it is necessary to descend the curtain body12, the pull string 51 will be pulled again, such that the positionlimit element 41 can release the link string 42. Now, the curtain body12 can be descended by the weight portion 14. In the meantime, the linkstring 42 is being moved downwardly in the through hole 321 of eachclamp portion 32 to achieve the effect of descending the curtain body12.

If a child is curious or playing with the pull string 51 and the pullstring 51 is wound around the child's body (such as the child's neck)accidentally, a relatively large external force (much greater than theforce for pulling the curtain body 12) will be applied to the pullstring 51, and the pair of connectors 52, 53 of each third latch 5 willbe separated from each other to prevent the pull string 51 from beingwound around a human body, so as to achieve a higher safety effect. Ifthe pull string 51 is wound around the child's body, the pair ofconnectors 52, 53 of each third latch 5 still cannot be separated, butthe pull string 51 applies an external force to the link string 42 topull the curtain body 12, so that the sewing thread 131 of theconnecting portion 13 will be broken and separated from the curtain body12, or the embedding portion 21 and the latch portion 22 of each firstlatch 2 or the fixing base 31 and the clamp portion 32 of each secondlatch 3 will be separated from each other respectively to effectivelyprevent the pull string 51 from being tightly wound around a human body,so as to achieve a higher safety effect for the operation of thecurtain.

The present invention comes with a safety structure, so that if the linkstring or the pull string of the curtain is pulled by a relatively largeexternal force, the connecting portions, first latches, second latchesand third latches will be separated to prevent the pull string frombeing wound around a human body by accident, so as to achieve a highersafety effect. Obviously, the invention complies with the patentapplication requirements, and products derived from the presentinvention can satisfy the current market requirements sufficiently.

While the invention has been described by means of specific embodiments,numerous modifications and variations could be made thereto by thoseskilled in the art without departing from the scope and spirit of theinvention set forth in the claims.

1. A safety structure of a curtain, comprising: a main body, including abeam, a curtain body with an end coupled to the beam, and a plurality ofconnecting portions disposed on the curtain body; a plurality of firstlatches, separately installed at another end of the curtain body; aplurality of second latches, separately installed on each connectingportion; an ascending/descending unit, coupled to the main body, andhaving a position limit element installed in the beam, and a link stringcoupled to an end of the first latch, passed through the second latch,and coupled to the position limit element; and a plurality of thirdlatches, installed at another end of the link string, and each thirdlatch including a pull string installed thereon.
 2. The safety structureof a curtain as recited in claim 1, wherein the curtain body includes aweight portion disposed at another end of the curtain body.
 3. Thesafety structure of a curtain as recited in claim 1, wherein eachconnecting portion is coupled to the curtain body by a sewing thread. 4.The safety structure of a curtain as recited in claim 1, wherein eachfirst latch includes an embedding portion disposed at another end of thecurtain body, a latch portion movably latched with the embeddingportion, and a fixing hole formed on each latch portion for coupling anend of the link string.
 5. The safety structure of a curtain as recitedin claim 1, wherein each second latch includes a fixing base disposed onthe connecting portion, and a clamp portion movably latched with thefixing base, and each clamp portion includes a through hole provided forpassing and coupling the link string.
 6. The safety structure of acurtain as recited in claim 1, wherein each third latch includes a pairof connectors installed to the link string and the pull stringrespectively and movably engaged with each other.